Air/Fuel Readings
12 August 2002, 11:16 PM
#1
Scooby Regular
Thread Starter
iTrader: (6)
Join Date: Apr 2002
Posts: 1,272
Likes: 0
Received 0 Likes
on
0 Posts
Just fitted a A/F gauge and not getting much response from it. When the ignition is switched on the 6th LED lights up and stays at this until fully up to temp, then it fluctuates between the 4th - 6th LED regardless of boost, revs or load.
I don't know if The sensor wire is connected to rigjt wire at the ECU, its currently on the white wire with the silver fleck, on a E802 ECU.
I don't know if The sensor wire is connected to rigjt wire at the ECU, its currently on the white wire with the silver fleck, on a E802 ECU.
13 August 2002, 05:30 PM
#3
Scooby Regular
Join Date: May 2001
Posts: 2,537
Likes: 0
Received 0 Likes
on
0 Posts
what age is your car? is it pre-facelift?...
mine doesn't do anything until the engine is warm
one problem could be your earth, where did you connect it?... check the voltage between live-earth and lamda-earth. It makes its readings by the difference between them... other than that I dont know.. I've got a Dawes one, what make is yours?
[Edited by Dizzy - 8/13/2002 5:40:06 PM]
mine doesn't do anything until the engine is warm
one problem could be your earth, where did you connect it?... check the voltage between live-earth and lamda-earth. It makes its readings by the difference between them... other than that I dont know.. I've got a Dawes one, what make is yours?
[Edited by Dizzy - 8/13/2002 5:40:06 PM]
13 August 2002, 05:47 PM
#4
Scooby Regular
Thread Starter
iTrader: (6)
Join Date: Apr 2002
Posts: 1,272
Likes: 0
Received 0 Likes
on
0 Posts
The cars a MY00 and the gauge is an autometer
I've got both the power and the earth from the radio supply, judging from the other threads it sounds like i've got the right control wire.
I've got both the power and the earth from the radio supply, judging from the other threads it sounds like i've got the right control wire.
13 August 2002, 10:27 PM
#7
Scooby Senior
Join Date: Oct 2001
Posts: 2,602
Likes: 0
Received 0 Likes
on
0 Posts
Try earthing direct to the chassis. Find a metal bolt in there somewhere amidst all the plastic & stick it under there.
For what it should be doing - it should be a couple of miutes before any sense comes from the thing, or you should believe it anyway. The lambda probe that it reads from takes a while to get 'up to temperature' & any readings before that will be off.
After that, it should swing back & forth when the car is running stoichometrically, i.e. cruising. When you floor it, what should happen is that the it should swing solidly into the red area (somewhat mysteriously red is good in this context - it means running rich) and hold there more or less. The further round, the richer the mixture.
Give the earth a check & see what happens then.
Although I might be blabbering about an entirely different gauge here
For what it should be doing - it should be a couple of miutes before any sense comes from the thing, or you should believe it anyway. The lambda probe that it reads from takes a while to get 'up to temperature' & any readings before that will be off.
After that, it should swing back & forth when the car is running stoichometrically, i.e. cruising. When you floor it, what should happen is that the it should swing solidly into the red area (somewhat mysteriously red is good in this context - it means running rich) and hold there more or less. The further round, the richer the mixture.
Give the earth a check & see what happens then.
Although I might be blabbering about an entirely different gauge here
Trending Topics
14 August 2002, 12:05 PM
#9
Scooby Regular
iTrader: (2)
Join Date: May 2000
Location: Class record holder at Pembrey Llandow Goodwood MIRA Hethel Blyton Curborough Lydden and Snetterton
Posts: 8,626
Likes: 0
Received 0 Likes
on
0 Posts
If you've tapped into the lamda signal at the ECU, I suggest you take the earth from the ECU as well. After all, thats what the ECU refs the sensor voltage against. I also suggest that you run your power from there as well, and twist the 3 wires around each other. A bit of drift whilst trying to measure a difference of 10mV isn't good
Justin
Justin
14 August 2002, 02:23 PM
#12
Scooby Regular
iTrader: (2)
Join Date: May 2000
Location: Class record holder at Pembrey Llandow Goodwood MIRA Hethel Blyton Curborough Lydden and Snetterton
Posts: 8,626
Likes: 0
Received 0 Likes
on
0 Posts
I don't have the ECU pinouts for your MY, but they are about, I'd suggest trawling through the Dawes AFR threads on here
Justin
Justin
Thread
Thread Starter
Forum
Replies
Last Post
Sam Witwicky
Engine Management and ECU Remapping
17
13 November 2015 10:49 AM